001 /*
002 * Copyright 2001-2005 Stephen Colebourne
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016 package org.joda.time.tz;
017
018 import java.util.Set;
019 import org.joda.time.DateTimeZone;
020
021 /**
022 * Service provider factory for time zones.
023 *
024 * @author Brian S O'Neill
025 * @since 1.0
026 */
027 public interface Provider {
028 /**
029 * Retrieves a DateTimeZone for the given id. All providers must at
030 * least support id "UTC".
031 *
032 * @return null if not found
033 */
034 DateTimeZone getZone(String id);
035
036 /**
037 * Returns an unmodifiable set of ids. All providers must at least
038 * support id "UTC".
039 */
040 Set getAvailableIDs();
041 }